Electric-arc lamp.



UNTTn STATES PATENT Trice.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 638,546, dated December 5, 1899. Application iiled October Z1, 1898. Renewed October 17, 1899. Serial No. 733,935. (No modem To @ZZ whom t may concern,.-

Be it known that I, EDWARD H'. BELDEN, a citizen of the United States, residingat Jackson, in the county of Jackson and State of lllichigam have invented certain new and useful Improvements in Electric-Arc Lamps, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to electric-arc lamps, and more particularly to means for automatically cleaning the arc-inclosing globe of arclamps.

It is well known that the accumulation of ashes and other products of combustion within the globe inclosing the arc in arc-lamps soon materially interferes with the radiation ofthe light, and the purpose of the present invention is to effect an automatic cleaning of the interior of the globe.

In an application for United States Letters Patent filed by me under date of October 19, 1898, Serial No. 694,008, I have. shown, described, and claimed an automatic globecleaner comprising a self-expanding wiperin connection with means for moving said wiper vertically within theglobe. Vhile the cleaner disclosed in said application is a practical device within certain limits of use, I have found that the intense heat within the globe after a time injuriously aects the spring forming the body of the wiper and so reduces its resiliency as to prevent its expanding suiciently to insure a proper wiping contact with the inner surface of the globe.

The present invention is designed as an improvement on the cleaner forming a feature of the above-named application for patent, and the distinguishing characteristic of the improved cleaner is that it is provided with supplemental means for expandingit, so that its wiping contact does not depend upon the inherent spring action or resiliency of the wiper itself.

The construction of the cleaner and its op` erating mechanism is fully described hereinafter and defined in the appended claims.

In the accompanying drawings, Figure lis an elevation, partly in section, of my improved cleaner in combination withmeans for operating it; and Fig. 2 is a detail sectional view of the cleaner and its attached parts. Y

The reference-n umeral l designates the arcinclosing globe, within which is arranged a wiper device comprising a ring 2, of iiexible material, preferably split or open at one side and suspended by hangers or brackets 3 and 4 from a movable supporting-ring 5,to which the brackets 3 and 4 are secured pivotally. The brackets 3 are in the form of-pendent arms, to the lower ends of which the flexible wiper is secured, while the brackets 4 are of angle or bell-crank form,pivotally secured at their angles to lugs 4a,depending from the ring 5, and having their upperarms oppositely projecting and connected to a plungeierod, so that both of the brackets may be turned on their pivots simultaneously,as will be hereinafter explained. The ends of the circular wiperare attached, respectively, one to each of the brackets 4.

6 designates a hollow operating-rod passing through an opening 7 in the ring 5 and held therein by a nut S. The upperend of the rod is connected to one end of a connecting-rod 9, the other end of which is attached to a Wrist-pin l0 on a driving-wheel ll, mounted upon a shaft l2, supported in bearings on the lamp-frame. The wheel ll is driven by an internal spring, and it is provided with a pe-A ripheral lug or tooth 13,adapted to be engaged by a detenta-bar 14, pivotally secured at one end to the lamp-frame and at its opposite end to a vertically-movable rack l5, provided with teeth 16 and suspended by engagement with pins 17 of gravity-cams 18.

Within the hollow rod 6 is arranged aplunger-rod 19, which extends down through the rod 6 and beyond the lower end thereof and is pivotally connected to the oppositely-extending arms of the brackets 4. The plunger-rod is supported by a cross-bar 20, which extends through an elongated slot 2l, formed in the rod 6. A coil-spring 22 surrounds the rod 6 above the cross-bar 20, the lower end of the spring bearing against the cross-bar, while its upper end is held by adjusting-nut 2Oa for tensioning the spring 22, the rod 19 being suitably threaded to receive the nut. The wiper is forced up and down within the globe by the movement of the rod 6, and the IOO lower end of the plunger-rod forces the brackets 4: apart, and consequently expands the circular flexible wiper to insure a good wiping contact with the globe.

While the means for reciprocating the rod 19 constitute no part of the present invention, (since any suitable means for the purpose may be employed,) I have shown in Fig. l the same means for this purpose as are disclosed in my former application, Serial No. 694,008, and comprising a rod 23, carrying the lower-carbon holder 2i and having a projection 25, adapted to strike the teeth of the rack l5 and lift the detent-bar 14 to govern the motion of the driving-wheel Il, it being understood that the rod 23 is elevated by the magnet of the lamp and the cooperating controlling means described and shown in my application above referred to. I would, however, have it understood that the present invention is independent of any particular operating means for the rod I9 and embraces all such modifications or changes in construction as may fall within the scope of the following claims.

I claimn l. In an arc-lamp the combination with an arc-inclosing globe, of a cleaner supported within said globe, and means operated by the movement ofthe carbon-carrying mechanism for moving the cleaner.

2. In an arc-lamp, the combination with an arc-inclosing globe, of a cleaner supported within the globe, means operated by the movement of the carbon-carrying mechanism for moving the cleaner and a device carried by the cleaner-operating means for expanding the cleaner.

3. In an arc-lamp the combination with an arc-inclosing globe, of a cleaner suspended Within the globe, means operated by the movement of the carbon-carrying mechanism for moving the cleaner vertically, andaspringpressed rod for expanding the cleaner.

4. In an arc-lamp the combination with an arc-inclosing globe, of a cleaner suspended within the globe, and comprising a flexible wiper-ring, means operated by the movement of the carbon-suspending mechanism for moving the Wiper, and a spring-pressed rod for expanding the flexible ring.

5. In an arc-lamp, the combination with an arc-inclosing globe, of a cleaner suspended within the globe, and comprising a flexible wiper, ot a supporting-ring from which the fiexible wiper is suspended, a hollow connecting-rod secured to said supporting-ring and adapted to be moved by mechanism which is automatically tripped by the movement of the carbon-moving mechanism and a springpressed plunger-rod arranged within the connecting-rod and adapted to expand the flexible ring.

6. In an arc-lamp, the combination With an arc-inclosing globe, of a cleaner comprisinga fiexible wiper suspended by brackets from a supporting-ring, a connecting-rod secured to said supporting-ring, mechanism for' moving saidrod by the movement of the carboncarrying mechanism and a spring-pressed rod carried by the connecting-rod for expanding t-he flexible ring.

7. In an arc-lamp, the combination with an arc-inclosing globe, of a cleaner comprising a supporting-ring, pivoted brackets depending from said ring, a wiper secured to said brackets, a connecting-rod secured to said supporting-ring, mechanism between said rod and ithe lower-carbon-supporting mechanism for movinglthe rod and a spring-pressed plungerrod connected to two of said brackets to turn them on their pivots to expand the wiper.

S. In an arc-lamp, the combination with an arc-inclosing globe, of a cleaner comprising a supporting-ring, brackets pivotally secured to said ring, a iiexible wiper secured to said brackets, a hollow connecting-rod secured to said supporting-ring, mechanism for operating said rod by the movement of the carboncarrying mechanism, and a spring-pressed plunger-rod arranged within the connectingrod, the lower end of' said plunger-rod being secured to two of the brackets to turn them on their pivots to expand the wiper.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD H. HELDEN.

lVitnesses:

ELLA D. WATT, HENRY E. COOPER. 

